'''
Created on 2013-5-9

@author: darcywang
'''
# -*- coding utf-8 -*-

class RomanException(Exception):
    pass

class OutOfRangeException(RomanException):
    pass

class NotIntegerException(RomanException):
    pass

class InvalidRomanNumber(RomanException):
    pass 

    
def toRoman(self, inter):
    pass
    
def fromRoman(self, roman):
    pass